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Interplanetary Memorial to Victims of Sept. 11, 2001

Feb. 6, 2004
The piece of metal with the American flag on it in this image of a NASA rover on Mars is made of aluminum recovered from the site of the World Trade Center towers in the weeks after their destruction.

This image shows the Mars Exploration Rover Spirit's "hand," or the tip of the instrument deployment device, poised in front of the rock nicknamed Adirondack. In preparation for grinding into Adirondack, Spirit cleaned off a portion of the rock's surface with a stainless steel brush located on its rock abrasion tool, seen here at the top of its hand. The image was taken by the rover's panoramic camera.

This image was originally entitled "Back in Action-2."

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